660431106 has 12 divisors (see below), whose sum is σ = 1430934102. Its totient is φ = 220143696.

The previous prime is 660431081. The next prime is 660431173. The reversal of 660431106 is 601134066.

It can be written as a sum of positive squares in only one way, i.e., 632774025 + 27657081 = 25155^2 + 5259^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 660431106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18345291 + ... + 18345326.

Almost surely, 2^660431106 is an apocalyptic number.

660431106 is an abundant number, since it is smaller than the sum of its proper divisors (770502996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660431106 is a wasteful number, since it uses less digits than its factorization.

660431106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36690625 (or 36690622 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 660431106 is about 25698.8541767916. The cubic root of 660431106 is about 870.8482966551.

The spelling of 660431106 in words is "six hundred sixty million, four hundred thirty-one thousand, one hundred six".